Medicines & Supplements A to Z > Bisacodyl


Last updated on July 16, 2019.

Overview   |   Dosage   |   Side Effects   |   Where To Buy  




What is Bisacodyl for?

Bisacodyl belongs to the class of medications called stimulant laxatives like Senna, which can stimulate a bowel movement by increasing the activity of the intestines. It is therefore commonly used to treat constipation or for bowel evacuation.

How to use it?

In Hong Kong, Bisacodyl is available in tablet and suppository form. If you are taking Bisacodyl tablets, there should be a bowel movement after about 8-12 hours. If you are using Bisacodyl suppository, the effect should be seen within about 15-60 minutes. You should avoid taking Bisacodyl tablets within one hour of taking antacids, milk or milk products. Unless advised by a healthcare professional, Bisacodyl should not be used for more than 7 days. Otherwise, bowel dependence might occur. Tablets have a special coating, so they should not be crushed, split, or chewed.

The suggested dosages for different uses and age groups are listed below:

For constipation


Oral: 5-10 mg once daily at night

Rectal: 10 mg once daily in the morning

Child 4-17 years

Oral: 5-20 mg once daily at night

Child 2-17 years

Rectal: 5-10 mg once daily 

For bowel evacuation


Initially take an oral dose of 10 mg twice daily in the morning and evening. Then, use a 10 mg suppository 1-2 hours before any procedure the following day.

What are the side effects of Bisacodyl?

Side effects of Bisacodyl are uncommon, but they can include abdominal cramps, nausea and vomiting. If you are using Bisacodyl suppository, there might be anal irritation.

Where to buy Bisacodyl in Hong Kong?

In Hong Kong, Bisacodyl is classified as over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.  

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

For detailed information about the use of Bisacodyl in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.